WO2000011109A1

WO2000011109A1 - Flame retardant composition and flame-retardant resin composition

Info

Publication number: WO2000011109A1
Application number: PCT/JP1999/004525
Authority: WO
Inventors: Yoshifusa Hara; Ken Tamura; Takashi Nishimura; Nobuo Matsumoto
Original assignee: Nippon Chemical Industrial Co., Ltd.
Priority date: 1998-08-24
Filing date: 1999-08-23
Publication date: 2000-03-02
Also published as: DE69912971T2; KR100503978B1; EP1116773A1; KR20010072942A; EP1116773B1; DE69912971D1; EP1116773A4

Abstract

A flame retardant composition characterized by comprising a melamine salt of nitrilotris(methylene)-phosphonic acid represented by general formula (1) and a hydrated metal compound (wherein M represents melamine and n is an integer of 1 to 6). The composition is reduced in fuming, emits no irritating odor, and can impart excellent flame retardancy to various resins without impairing the mechanical properties inherent therein.

Description

Description Flame retardant composition and flame retardant resin composition

The present invention provides a non-halogen flame-retardant composition capable of imparting excellent flame retardancy to various resins without deteriorating the inherent mechanical properties of the resin, with low smoke emission and no irritating odor. The present invention relates to a flame-retardant resin composition. Background art

Halides such as chlorine and bromine, phosphorus compounds, nitrogen compounds, or antimony and boron inorganic compounds have been used as flame retardants for plastics. However, in recent years, the level of flame retardancy has become severe in all fields, and high flame retardancy is required. In particular, flame retardants containing bromine and chlorine are dioxins that are toxic to the human body in trace amounts during combustion. It has been pointed out that there is a possibility of the occurrence of fire, and there is an increasing demand for non-halogen flame retardants.

Examples of non-halogen flame retardants include resin compositions in which red phosphorus is blended with a curable resin (Japanese Patent Publication No. 59-94942), hydrated alumina as an epoxy resin flame retardant No. 05—25 369), surface-treated red phosphorus, hydrated alumina, powdered silica (Japanese Patent Application Laid-Open No. 58-1989), and modified red phosphorus (Japanese Patent Application JP-A-63-156680), calcium borate and aluminum hydroxide or magnesium hydroxide (Japanese Patent Application Laid-Open No. 05-37774), phenol resin Against boric acid and antimony trioxide (Japanese Patent Application Laid-Open No. 60-81224), and against a polyurethane resin, a compound having three triazine structures in the molecule (Japanese Unexamined Patent Publication No. No. 241) has been proposed.

On the other hand, for a thermoplastic resin, magnesium hydroxide (Japanese Patent Application Laid-Open Nos. 54-83,852 and 54-131,645), for polyamide resin, and Melamine cyanurate (Japanese Patent Application Laid-Open No. 53-319579, Japanese Patent Application Laid-Open No. 54-91558) and an organic sulfonate for polycarbonate (Japanese Patent Application Laid-Open No. 50-9855) No. 39, Japanese Patent Publication No. 50-985400), sulfide salts (Japanese Patent Publication No. H01-224304), phosphonate compounds and polylylates for polyphenylene oxide. Ammonium phosphate (Japanese Patent Application Laid-Open No. 52-864449), a phosphate compound and antimony trioxide (Japanese Patent Application Laid-Open No. 49-32947), and polyphosphonate for polyester. (U.S. Pat. No. 3,719,727) have been proposed. However, since red phosphorus is reddish brown, the resin is colored by the red phosphorus, making it impossible to color the resin. In addition, the working environment is deteriorated due to the generation of phosphine gas during resin thermal processing or incineration.To suppress this, red phosphorus is coated with a coating agent. It cannot be completely suppressed.

In addition, it is difficult for other flame retardants to impart flame retardancy to various resins without impairing the color tone, mechanical properties, and color tone of the resin. There's a problem.

Organophosphorus flame retardants have received particular attention as non-halogen flame retardants. Its flame-retardant mechanism has a high volatility: the phosphorus compound vaporized by heating acts as an inhibitor of combustion in the gaseous phase as a diluent for oxygen gas, a cooling effect for the combustion system due to volatilization, and a suppression of chemical reactions in combustion. Suppress plastic combustion by its effect. On the other hand, those with low volatility are thermally decomposed by heating to generate phosphoric acid, which is converted into meta-phosphoric acid and polymer phosphoric acid. Form an acid polymer. In addition, the plastic is carbonized by the dehydration reaction of phosphoric acid to form a carbonized layer, thereby blocking the inflow of air and cutting off the supply of heat energy from the outside to suppress combustion.

At present, various phosphoric esters and phosphites have been proposed as organophosphorus flame retardants, but many of these compounds have low affinity for resins due to their water solubility and low P content in the compounds. Therefore, it must be contained in a large amount in the resin in order to enhance the flame retardant effect, and the mechanical properties are impaired.

Nitrilotris (methylene) phosphonic acid and its derivatives are used in various fields as scale inhibitors, anticorrosives, metal surface treatment agents, and chelating agents. Further, Japanese Patent Application Laid-Open No. 05-4977 discloses that Nitrilo tris (methylene) phosphonic acid It is disclosed that salt is an excellent flame retardant compound. However, a resin containing the compound as a flame retardant can provide a certain degree of flame retardant effect, but the compound alone cannot provide a sufficient flame retardant effect, and also has poor mechanical properties. There is a disadvantage that it decreases.

It is known that certain flame retardants have a greater flame retardant effect due to their synergistic effect than do flame retardants alone. For example, halogen-containing flame retardants and phosphorus-containing flame retardants, antimony trioxide and halogen-containing flame retardants, halogen-containing flame retardants and organic peroxides are known.

In view of the above problems, the inventors of the present invention have conducted intensive studies on non-halogen flame retardants, and as a result, focused on nitrile tris (methylene) phosphonic acid having a high P content. The present inventors have found that a resin containing a system flame retardant as an active ingredient can impart excellent flame retardancy to various resins without impairing mechanical properties, and have completed the present invention.

That is, the present invention provides a non-halogen flame retardant composition which is capable of imparting excellent flame retardancy to various resins without deteriorating mechanical properties and which has a low smoke emission and no irritating odor, and excellent flame retardancy. An object of the present invention is to provide a resin composition having: Disclosure of the invention

The flame retardant composition provided by the present invention has the following general formula (1):

(In the formula, Μ represents melamine, and η represents an integer of 1 to 6.) It is characterized by comprising a melamine ditrilotris (methylene) phosphonate represented by the following formula: and a hydrated metal compound.

Further, the flame-retardant resin composition to be provided by the present invention is characterized by containing the above-mentioned flame-retardant composition. BEST MODE FOR CARRYING OUT THE INVENTION / 11 Hereinafter, the present invention will be described in detail.

The flame retardant composition of the present invention has the following general formula (1)

ノ \

One C H N nM (1)

Three

Characterized by containing melamine nitrilotris (methylene) phosphonate represented by the formula (1) and a hydrated metal compound as active ingredients.

Specific examples of the melamine ditrilotris (methylene) phosphonate represented by the general formula (1) include:

Nitrilotris (methylene) phosphonic acid-mef

Nitrilotris (methylene) phosphonic acid · 2 melamine

Nitrilotris (methylene) phosphonic acid · 3 melamine

Nitrilotris (methylene) phosphonic acid / 4 melamine

Nitrilotris (methylene) phosphonic acid-5 melamine

Nitrilotris (methylene) phosphonic acid-6 melamine

These compounds are used alone or in combination of two or more.

According to the present invention, the compound represented by the general formula (1)

The method for producing the melamine acid salt is not particularly limited, and a known method can be used. For example, the following general formula (2): N (2)

Three

The reaction can be carried out by reacting the tritris (methylene) phosphonic acid and melamine shown in the above in water, a mixed solvent of water-acetone, or an aqueous solvent such as water-alcohol, usually at a temperature of 80 ° C or higher. .

In the reaction for obtaining the melamine ditrilotris (methylene) phosphonate, which is the target product of the above reaction, the reaction between melamine and ditrilotritris (methylene) phosphonic acid represented by the general formula (2) as raw materials is carried out. The ratio is usually in the range of 1 to 6 mol of melamine to 1 mol of the phosphonic acid of the general formula (2), and within this range, the melamine introduced into the target substance The amount of melamine used may be appropriately adjusted according to the amount of min, for example, 1 to 6 melamine.

The hydrated metal _{_{_{compound, M m O n · XH 2}}} 0 (M is a metal with a burn suppressing action by endothermic reaction, m, n is an integer of 1 or more determined by the valency of the metal, X is the content binding Akiramizu Or a double salt containing the compound, specifically, calcium hydroxide, magnesium hydroxide, basic magnesium carbonate, calcium hydroxide, barium hydroxide, zirconium hydroxide, dosonite, Zinc stannate, zinc borate, aluminum borate, antimony pentoxide, basic zinc carbonate, cobalt oxide, zirconium oxide, tin oxide, aluminum oxide, titanium oxide, magnesium oxide, calcium silicate, borax, zinc molybdate , Zinc phosphate, magnesium phosphate, hide mouth talcite, hide mouth calmite, kaolin, talc Serisai DOO, Pairofirai DOO, bentonite preparative force Orinai DOO, calcium sulfate, one or more such zinc sulfate. These hydrated metal compounds may be surface-treated.

The mixing ratio of the hydrated metal compound is usually 1 to 200 parts by weight, preferably 100 to 100 parts by weight, based on 100 parts by weight of melamine ditrilotris (methylene) phosphonate. It is.

Further, in the flame retardant composition of the present invention, by further using a flame retardant auxiliary, the flame retardant effect can be further enhanced. Examples of the flame retardant aid include metal oxides such as antimony trioxide, copper oxide, magnesium oxide, zinc oxide, molybdenum oxide, iron oxide, manganese oxide, aluminum oxide, tin oxide, titanium oxide, and nickel oxide. Carbonates such as calcium carbonate and barium carbonate, zinc metaborate, metaborate such as barium metaborate, melamine, melamine cyanurate, methylolated melamine, (iso) cyanuric acid, melam, melem, melon, succino guamin Melamine sulfate, melamine sulfate, acetate guanamine sulfate, melam sulfate, guanylmelamine sulfate, melamine resin, BT resin, cyanuric acid, isocyanuric acid, isocyanuric acid derivative, melamine isocyanurate, benzoguanamine, melamine derivative such as acetoguanamine, Guani Emissions-based compounds, silicone compounds, one or more selected phosphorus-based flame retardant or al and the like, among these, particularly preferred phosphorus flame It is a fuel.

Examples of the phosphorus-based flame retardants include triethyl phosphate, tricresyl phosphate, triflynyl phosphate, cresyl phenyl phosphate, octyl diphenyl phosphate, ethyl ethyl phosphate, dihydroxy propylene phosphate, Ethylene phosphate dinatrium ester, methylphosphonic acid, methyl methylphosphonate, methyl methylphosphonate, ethyl methylphosphonate, ethylphosphonic acid, propylphosphonic acid, butylphosphonic acid, 2-methylpyrogenic phosphonic acid, t-butylphosphonic acid, 2,3-dimethylbutylphosphonic acid Acid, octylphosphonic acid, phenylphosphonic acid, octylphenylphosphonate, dimethylphosphinic acid, methylethylphosphinic acid, methylpropylphosphinic acid, getylphosphinic acid, octylphosphonic acid Finic acid, Phenylphosphinic acid, Jethylphenylphosphinic acid, Diphenylphosphinic acid, Bis (4-methoxyphenyl) phosphinic acid, Red phosphorus, Ammonium phosphate, Ammonium polyphosphate, Melamine phosphate And one or more selected from guanyl urea phosphate, melamine polyphosphate, guanidine phosphate, ethylenediamine phosphate, phosphazene, and melamine methylphosphonate. Of these, red phosphorus, ammonium phosphate, ammonium phosphate, melamine phosphate, guanylurea phosphate, melamine polyphosphate, and guanidine phosphate are preferably used.

Red phosphorus whose surface is modified with an organic substance and / or an inorganic substance is preferable. For example, phenol resin, epoxy resin, ethylene-vinyl acetate copolymer, melamine-formaldehyde polycondensate, Mg, Ca, T i , Al, Co and Zr hydroxides and those surface-treated with one or more selected from these oxides, but are not limited thereto.

The compounding ratio of these flame retardant aids is usually from 0.1 to 10% by weight, preferably from 0.5 to 5% by weight, as a flame retardant composition.

The flame retardant composition containing the melamine ditrilotris (methylene) phosphonate and the hydrated metal compound of the present invention is prepared by a wet method or a dry method in advance so as to have a uniform composition in the above ratio. It may be prepared as a mixed powder by mechanical means in which a strong shearing force acts, or may be separately mixed with the resin. The flame retardant composition of the present invention may be prepared in advance as a mixed powder by a mechanical means in which a strong shearing force is applied by a wet method or a dry method so that the composition is uniform in the above ratio. However, they may be separately mixed with the resin.

The flame retardant composition according to the present invention can impart excellent flame retardancy to various resins.

Next, the flame-retardant resin composition according to the present invention will be described.

The resin that can be used is not particularly limited. For example, epoxy resin, phenol resin, polyurethane resin, melamine resin, urea resin, aniline resin, furan resin, alkyd resin, xylene resin, unsaturated polyester resin, diary resin (I) Curable resins such as phthalate resin, polybutylene terephthalate resin, polyethylene terephthalate resin, polycarbonate, boliphenylene oxide, polyphenylene ether, nylon 6, nylon 66, nylon 12, polyacetal, polyethylene, polypropylene, Polybutadiene, polyacrylonitrile, polystyrene, polymethyl methacrylate, polyethylene oxide, polytetramethylenoxide, thermoplastic polyurethane, phenoxy resin, polyamide, Tylene / propylene copolymer, ethylene / 1-butene copolymer, ethylene propylene / non-conjugated gen copolymer, ethylene / ethyl acrylate copolymer, ethylene / glycidyl methacrylate copolymer, ethylene / vinyl acetate / methacrylic Examples include acid glycidyl copolymer, ethylene / propylene-g-maleic anhydride copolymer, polyester-polyester elastomer, polytetrafluoroethylene, and modified products thereof. These resins may be a homopolymer or a copolymer, or may be a mixture of two or more.

Here, the curable resin refers to a three-dimensional network structure in which a cross-linking structure develops due to a chemical change caused by the action of heat, a catalyst, or ultraviolet light, and has a three-dimensional network structure. Shows synthetic resins that are insoluble and infusible. In addition, a thermoplastic resin indicates a resin that exhibits fluidity by heating and can be shaped by this. The compounding ratio of the flame retardant composition to various resins is 3 to 20 parts by weight, preferably 5 to 15 parts by weight, as P with respect to 100 parts by weight of the resin. The reason is that if the mixing ratio is less than 3 parts by weight, it is difficult to obtain a sufficient or flame-retardant effect. When the amount is larger than the weight part, the flame-retardant effect increases, but the mechanical properties of the molded article tend to decrease, which is not preferable.

In addition, other components to be added to the resin, such as phosphorus-based, ionic-based, hindered phenol-based antioxidants, heat stabilizers, ultraviolet absorbers, lubricants, release agents, dyes, and pigments It can be used in combination with usual additives such as agents, crosslinking agents, softeners and dispersants.

If necessary, fibrous and / or granular fillers can be added to significantly improve the rigidity of the resin. Such fillers include, for example, glass fiber, carbon fiber, metal fiber, aramide resin, asbestos, titanate power, mullite power, wallastite, glass flake, glass beads, talc, my power, clay, carbonate Examples include calcium, calcium silicate, barium sulfate, titanium oxide, fused silica, crystalline silica, magnesia, and aluminum oxide.

The flame retardant composition of the present invention can be contained in various resins by a generally known method. For example, in the case of a curable resin, a method in which the flame retardant composition of the present invention is mixed with the curable resin and other components at the same time, a method in which the flame retardant composition of the present invention is mixed in advance with one of the resin components. A method of mixing this with a curable resin, a method of melting and mixing the flame retardant composition of the present invention with an extruder if it is a thermoplastic resin, or a method of uniformly mixing particles with each other by mechanical means. , And then molding at the same time as mixing with an injection molding machine.

The flame-retardant resin composition of the present invention is an extremely safe plastic material having no irritating odor because it does not generate halogenated gas during combustion while maintaining the mechanical properties inherent in the resin. It can be used for a wide range of applications, such as electrical stoppage materials, laminates, connectors, switches, case members, transformer members, electrical components such as coil pobins, building materials, transportation equipment such as automobiles, packaging materials, household commodities, and more. Example

Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited thereto.

<Preparation of melamine ditrilotris (methylene) phosphonate> • Sample A: nitrilotris (methylene) phosphonic acid '6 melamine

13 L of tap water and 807.43 g (1.35 mol) of a 50% aqueous solution of nitrile tris (methylene) phosphonic acid (hereinafter abbreviated as NTP) were added to an 18 L stainless steel container and stirred. After the temperature was raised to 80 ° C., 969.48 g (7.68 mol) of melamine was gradually added and stirred. After the addition of melamine, stirring was continued at 80 until the pH of the reaction solution became constant (about 4.5). Thereafter, centrifugal filtration was performed to obtain white crystals. The crystals were dried at 100 ° C. for 24 hours and pulverized with a mixer to obtain 1144.53 g of the desired product. Yield 84.3% (v.s. NTP).

Next, as a result of measuring C, H, and N by elemental analysis, it was C _; 23.41%, H; 4.53%, and N; 46. 63%.

Sample B: Nitrilotris (methylene) phosphonic acid / 4 melamine

15 L of tap water and 897.0 g (1.49 mol) of NTP (50% aqueous solution) were added to an 18 L stainless steel container and stirred. After the temperature was raised to 80 ° C., 751.6 g (5.96 inol) of melamine was gradually added and stirred. After the addition of melamine, stirring was continued at 80 ° C until the pH of the reaction solution became constant (about 4.2). Thereafter, centrifugal filtration was performed to obtain white crystals. The crystals are dried at 100 ° C for 24 hours and pulverized with a mixer to obtain the desired product.

1144.06 g was obtained. Yield 95.2% (v.s. NTP).

Next, as a result of measuring C, H, and N by elemental analysis, it was C; 21.52%, H; 4.41%, N; 41.82%.

'Sample C; tri-tris (methylene) phosphonic acid' 3 melamine

15 L of tap water and 1802.0 g (3.01 mol) of NTP (50% aqueous solution) were added to an 18 L stainless steel container and stirred. After the temperature was raised to 80 ° C., 1140.0 g (9.03 mol) of melamine was gradually added, followed by stirring. After the addition of melamine, stirring was continued at 80 ° C until the pH of the reaction solution became constant (about 1.5). Thereafter, centrifugal filtration was performed to obtain white crystals. The crystals are dried at 100 ° C for 24 hours and pulverized with a mixer to obtain the desired product.

1909.66 g was obtained. Yield 93.9% (v.s. NTP).

Next, as a result of measuring C and H by elemental analysis, it was C; 20.84%, H; 4.41%, N; 38.49%.

• Sample D: nitrilotris (methylene) phosphonic acid · 2 melamine 10 L of tap water and 1802.0 g (3.00 mol) of NTP (50% aqueous solution) were added to an 18 L stainless steel container and stirred. After the temperature was raised to 80 ° C, 762.0 g (6.0 (kol)) of melamine was gradually added and the mixture was stirred. After completion of the addition of melamine, the reaction solution was maintained at 80 ° C until the pH of the reaction solution became constant (about 1.5). Thereafter, centrifugal filtration was performed to obtain white crystals, which were dried at 100 ° C. for 24 hours and pulverized with a mixer to obtain 1494.5 g of a desired product. (vs NTP).

Next, as a result of measuring C, H, and N by elemental analysis, it was C: 19.79%, H; 4.38%, N; 32.02%.

Examples 1-4 and Comparative Examples 1-5

Various additives were added to the ethylene ethyl acrylate resin at the mixing ratios shown in Table 1, and the mixture was kneaded with a hot roll set at 120 to 130 ° C for 5 to 10 minutes. Using a heating press, create a 3 mm thick sheet at a molding pressure of 150 kg / cm ² , a pressurization temperature of 5 minutes, a mold temperature of 115 ° C, and a length of 12.5 mm and a width. A 13 mm test piece was prepared.

The flame retardancy test is a vertical burn test (94V—0, 94V—1 and 94V—1) of a resin that has been processed to a length of 125 mm, a width of 13 mm, and a thickness of 3 mm. 94V-2). Table 3 shows the results. Table 2 shows the conditions for UL 94.

table 1

The numerical values in Table 1 indicate parts by weight. Table 2

Table 3

From the results shown in Table 3, the resin blended with the flame retardant composition of the present invention shows superior flame retardancy as compared with the resin using the melamine salt of tritritris (methylene) phosphonic acid alone. I understand.

Example 5 8 and Comparative Example 6 7

A hot roll set at 80-90 ° C with various additives added to the novolak resin prepared at a molar ratio of formaldehyde / phenol = 0.9 at the mixing ratio shown in Table 4. For 5 minutes. After pulverization, using a universal press, molding pressure of 250 kg / cm, pressurization time of 60 seconds, mold temperature of 150 ° C, and molded product having a predetermined shape Created.

The flame retardancy test was evaluated by the same operating method as in Examples 1 to 4. Table 5 shows the presence or absence of phosphine gas during molding and the surface properties of the molded product.

The red phosphorus whose surface was modified with a phenol resin was used.

Table 4 (parts by weight)

Table 5

(Note 1) The generation of phosphine gas (PH ₃ ) was measured by the detector tube method,

None: less than 0.15 ppm

Available: 0.15 ppm or more

(Note 2) Surface properties were measured by touch. From the results shown in Table 5, the phenol resin containing the flame retardant composition of the present invention is excellent in flame retardancy, the surface of the molded article is smooth, and no phosphine gas is generated during molding. In contrast, those containing calcium borate also show excellent flame retardancy, but the surface of the molded product is rough. The compound containing red phosphorus also shows excellent flame retardancy, but phosphine gas was generated during processing.

Examples 9 to 12 and Comparative Examples 8 to 9

Various additives were compounded in bisphenol A diglycidyl ether type epoxy resin at the compounding ratio shown in Table 6, and the resulting mixture was poured into a mold having a predetermined shape and cured at 105 ° C for 10 hours.

The flammability of each sample based on UL94 and the presence or absence of phosphine during molding were measured. The results are shown in Table 7.

The red phosphorus whose surface was modified with a phenol resin was used. Table 6 (parts by weight)

TMHPA; Tetramethylhexahydrophthalic anhydride Table Ί

Example 13 to 21

Add various additives shown in Table 7 to various resins, prepare tensile test specimens specified in AT SMD-638 by 30πιιηΦ screw extruder, injection molding, and strength based on JISK7113 And elongation were measured.

Similarly, a test piece for flame retardancy evaluation based on UL 94 was prepared, and the flammability was measured. Table 9 shows the results.

Red phosphorus whose surface was modified with aluminum hydroxide and titanium hydroxide was used.

The conditions for melt extrusion, pellet drying, and injection molding for each resin are shown below. 'Polybutylene terephthalate (hereinafter abbreviated as PBT)

Extrusion; 250-290 ° C / 150 rpm

Drying: 110 ° C / 12 hours

Molding: 250-290 ° C / Mold 80 ° C

• Nylon 6

Extrusion; 250-300 ° C / 150 rpm

Drying; 100 ° C / 24 hours

Molding: 250 ~ 300 / Mold 80 ° C

• Polycarbonate component

Extrusion; 2 60-320 "C / 75 rpm

Drying; 1 20 ° C / 12 hours

Molding: 2 60-320 / Die 1 110 ° C Table 8 (parts by weight)

Table 9

Example 22 and Comparative Examples 11 to 14

Various additives were added to a polypropylene resin (hereinafter abbreviated as PP) at the mixing ratio shown in Table 10, and kneaded with a hot roll set at 230 ° C for 5 minutes. Melt extrusion was performed at a screw rotation speed of 87 rpm. A test piece based on UL94 was prepared by injection molding (cylinder temperature: 230 ° C, mold temperature: 50 ° C). Incidentally, the tin hydrate oxide, those S Ita_〇 · H ₂ 〇, zinc borate used was a _{_{2 Z ηθ 3 B 2 0 3}} · 3. 5 H 2 〇.

Table 10 (parts by weight)

Examples 26 to 29 and Comparative Examples 15 to 19

Various additives were added to a mixture of poly (2,6-dimethyl-1,4-phenylene) oxide and polystyrene (hereinafter abbreviated as PPO) at the mixing ratio shown in Table 11 and The mixture was kneaded with a hot roll set at 240 to 310 ° C for 5 minutes. Melt extrusion was performed at a screw rotation speed of 40 to 100 rpm. The obtained billet was dried at 110 ° C for 4 hours, and a test piece based on UL 94 was prepared by injection molding (cylinder temperature: 240 to 310 ° C, mold temperature 90 ° C).

Note that borax is of a N a ₂ 〇 _{_{· B 2 0 5 · 5 H}} 2 0, Hydro evening Rusai TMG, use those Mg ₆ A 1 ₁₂ (OH) of ₁₆ C0 ₃ '4 H ₂ 〇 Was. Table 11 (parts by weight)

Industrial applicability

As described above, the flame retardant composition of the present invention can impart an excellent flame retardant effect to various resins while maintaining the original mechanical properties of the resin, and has a low smoke emission and no irritating odor. The utility value is extremely large as a halogen-free flame retardant.

Claims

The scope of the claims

1. The following general formula (1)

(Wherein, Μ represents melamine, and η represents an integer of 1 to 6.) wherein melamine ditrilotris (methylene) phosphonate and a hydrated metal compound are contained. Flame retardant composition.

2. The flame retardant composition according to claim 1, further comprising a flame retardant aid.

3. The flame retardant composition according to claim 2, wherein the flame retardant auxiliary is a phosphorus-based flame retardant.

4. The phosphorus-based flame retardant is at least one selected from red phosphorus, ammonium phosphate, ammonium polyphosphate, melamine phosphate, guanylurea phosphate, melamine polyphosphate, and guanidine phosphate. 3. The flame retardant composition according to 3.

5. A flame-retardant resin composition comprising the flame-retardant composition according to any one of claims 1 to 3.